Attachment for furnaces



(No Model.) M'. F.. WOOD.

ATTACHMENT FOR FURNACES;

Fl'g'hi N, PETERS. PhmwLllhograpMr. Wilmington. D, C,

UNITED STATES PATENT OFFICE.

MORTIMER F. WOOD OF SAN FRANCISCO, CALIFORNIA.

ATTACH M ENT. FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 253,462, dated February '7, 1882.

Application filed July 8, 1881. (No model.)

To all whom it may concern:

Be it known that I, MORTIMER F. WOOD, of the city and county of San Francisco. State of California, have invented an Improved Attachment for Furnaces; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to an improved attachment for furnaces, the object of which is to utilize the exhaust-steam to produce more perfect combustion and the muffling of the sound of the exhaust, thus doing away with all smoke and noise.

The invention consists of a pipe attached to the exhaust, and having within it at the beginning a series of flanges or blades so set as to cause the steam to take a winding or tortu ous course. The pipe is carried around the boiler on the outside, and returned into the fire-box just above the grate-bars, within the fire, and thence proceeds around three sides of the fire-box and up through the fire to the level of the live coals, across which it extends. It is here provided with apertures from which the gas is directed upon the coals and causes more perfect combustion.

Referring to the accompanying drawings, Figure 1 is a horizontal section, showing my invention. Fig. 2 is a perspective view. Fig. 3 is a longitudinal section of the pipe. Fig. 4 is a transverse section of the pipe.

Let A represent my boiler, and B the firebox. 0 represents a pipe, the end of which is connected at any suitable point with the exhaust from the engine. The pipe is carried around the side of the boiler on the outside, and has acontracted portion (marked E) which serves as a check for the steam, and from which the condensation may be drawn off. The pipe is carried into the fire-box just above the gratebars, at the bottom of the bed of coals. lt proceeds around three sides of the fire-box and then up through the mass of coals and across in front, just under the fire-box door on the inside, and about on a level with the surface of the coals. In this cross portion are apertures a. In the first end of the pipe 0 are the blades or flanges Gr, extending from the sides alternately, and forming a winding passage between them.

The operation of the device is as follows: The exhaust-steam ordinarily is puffed off with considerable sound and is wasted. In my invention it enters the pipe 0, and its rapid and forcible progress is at once checked by the blades G, which it has to pass in awinding or tortuous course, so that by the time it is conducted through the full extentot' the pipe and finds an opening in the fire box its force and power are broken, and it is ejected noiselessly and without much draft, thereby adding to combustion and producing an economy in fuel. The blades therefore act as mufflers, and by breaking the force of the steam, cause it to enter the fire-box with but slight force. Ajet of steam would tend to extinguish the fire, and when superheated, if blown in with force, would cause so great'a draft as to increase combustion too much; but by breaking its force and at the same time heating it, combustion is more perfect without being too greatly accelerated. When the steam enters the tirebox while yet in the pipe it is conducted in the midst of the fire for aconsiderable distance, and is heated to a high degree, so that when it finds its way out it is in a proper condition to feed the fire. There is no moisture left in it, and its hydrogen, being directed upon the live coals, produces a more perfect com bastion, and thus prevents any smoke.

This device is designed as an attachment for any furnace, and will effect considerable economy in fuel.

Although I have here described the invention as utilizing exhaust-steam, it is obvious that I could use prime steam, but with less economy.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The furnace attachment consisting of the pipe 0, with its alternately oppositely placed blades or flanges G, said pipe entering the firebox and having the apertures a, when arranged and used substantially as and for the purpose herein described.

2. The pipe 0, connected with the exhaust of an engine, and having the alternately oppositely placed blades or flanges G for muflling the sound of the exhaust, substantially as herein described.

In witness whereof I have hereunto set my hand.

MORTIMER F. WOOD.

' Witnesses:

FRANK A. BRooKs, S. H. ,NoURsE. 

